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Automan
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« Reply #1 on: August 30, 2011, 10:51:57 AM » |
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Confused!
If you have a FIT installation in the UK don't they always pay for it whether they want it or not?
Or can they say electric demand is low, we don't want it?
Automan.
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john999boy
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« Reply #2 on: August 30, 2011, 11:08:08 AM » |
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Confused!
If you have a FIT installation in the UK don't they always pay for it whether they want it or not?
Or can they say electric demand is low, we don't want it?
They pay for all and take whatever spare capacity is being generated but EMMA utilises the spare power for your own use. |
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8.46kWp solar PV - 169° - 40° slope - 53°N.
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billi
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« Reply #4 on: August 30, 2011, 11:23:18 AM » |
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my neighbour here in Ireland has one
Is it not just a fast switching immersion heater control ?
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Guinness no Grid comes near
1.6 kw and 2.4 kw PV array , Outback MX 60 and FM80 charge controller ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw windturbine
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RobertReadman
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« Reply #5 on: August 30, 2011, 12:40:52 PM » |
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Is it not just a fast switching immersion heater control ?
It can't be, it looked to make sense, i.e. 3kW/h getting exported so sends it to the immersion heater. (1A, and 1B). 2A and 2C make sense, but 2B doesn't! If 3kW/h is getting exported and then the house needs to use 1kW/h, how does emma only send 2kW/h to a 3kW/h immersion heater? A better example to this is... PV is generating 1.5kW/h as there are clouds, if my house is using 0.6kW/h, and 0.9kW/h is being exported. How does emma send that 0.9kW/h to the immersion heater? when the coil is a 3kW/h coil? |
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3.6kWp with 15x 240W Sanyo HIT-N240SE10 Panels into an SMA Sunny Boy 4000TL-20. SMA Sunny Beam, SMA Sunny Sensor, SMA Sunny Portal, SMA Sunny Webbox 2.0 |
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billi
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« Reply #6 on: August 30, 2011, 12:49:36 PM » |
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How does emma send that 0.9kW/h to the immersion heater? when the coil is a 3kW/h coil? cant tell you that , but as far as i can see it will not switch on the washing machine or a charger for the loved electric moppet during the day , it switches the immersion or can it do more ? |
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Guinness no Grid comes near
1.6 kw and 2.4 kw PV array , Outback MX 60 and FM80 charge controller ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw windturbine
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brackwell
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« Reply #7 on: August 30, 2011, 01:29:56 PM » |
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My understanding is there is not a problem feeding 0.9Kw into a 3Kw immersion. you will just get that much heat out. However electric motors etc can have considerable start up loads which could not be supplied.
However what happens when the Kw is greater than the 3Kw - the element burns out?
Ken
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billi
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« Reply #8 on: August 30, 2011, 01:43:34 PM » |
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However what happens when the Kw is greater than the 3Kw - the element burns out? i guess then the worst case scenario to a FIT harvesting installation idea will happen - a few watts are exported to the National Grid and my neighbour gets those - horror -  |
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« Last Edit: August 30, 2011, 01:45:53 PM by billi »
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Guinness no Grid comes near
1.6 kw and 2.4 kw PV array , Outback MX 60 and FM80 charge controller ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw windturbine
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john999boy
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« Reply #9 on: August 30, 2011, 01:47:41 PM » |
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However what happens when the Kw is greater than the 3Kw - the element burns out?
It can't/won't take more than 3kw even if EMMA had more to spare. |
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8.46kWp solar PV - 169° - 40° slope - 53°N.
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skyewright
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« Reply #10 on: August 30, 2011, 01:47:58 PM » |
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How does emma send that 0.9kW/h to the immersion heater? when the coil is a 3kW/h coil? cant tell you that "I am not an electrician", but... I think it may use some sort of "chopping up" of the supply (waveform?) so that the dump is only given the wattage that would otherwise be exported. but as far as i can see it will not switch on the washing machine or a charger for the loved electric moppet during the day , it switches the immersion or can it do more ? From what I recall its diversion of "excess" is only direct to something that can flexibly absorb it, e.g. a resistive heating element of some sort. |
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Regards
David
3.91kWp PV (17 x Moser Baer 230 and Aurora PVI-3.6-OUTD-S-UK), slope 40°, WSW, Lat 57° 9' (Isle of Skye)
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skyewright
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« Reply #11 on: August 30, 2011, 01:59:28 PM » |
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i guess then the worst case scenario to a FIT harvesting installation idea will happen - a few watts are exported to the National Grid and my neighbour gets those - horror - Shock. Horror. Indeed.  Maybe I'm strange, but I like seeing a large export figure and a low household usage figure? Setting aside the issue of " what's best for the planet", for something like the EMMA to be cost effective, someone needs to be generating substantially more than they use and have a use for that energy as heat and have a means for storing that energy as and when it is being produced and for the saving made over what you'd otherwise pay for that energy to provide a reasonable payback against the (when last I looked) substantial price tag of the EMMA unit... |
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« Last Edit: August 30, 2011, 02:15:48 PM by skyewright »
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Regards
David
3.91kWp PV (17 x Moser Baer 230 and Aurora PVI-3.6-OUTD-S-UK), slope 40°, WSW, Lat 57° 9' (Isle of Skye)
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billi
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« Reply #12 on: August 30, 2011, 02:09:07 PM » |
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Maybe i am strange too  and sarcastic Best thing what can happen is to flood the Grid with renewable units in my opinion , sounds strange , but will possibly result in a wider acceptance for future developments and open up a Market we live in an very important time and i think its the wrong time to burn PV units yet Maybe in 30 -40 years ( hopefully ) http://www.bloomberg.com/news/2011-08-29/solar-may-produce-most-of-world-s-power-by-2060-iea-says.html |
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Guinness no Grid comes near
1.6 kw and 2.4 kw PV array , Outback MX 60 and FM80 charge controller ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw windturbine
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skyewright
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« Reply #13 on: August 30, 2011, 02:17:41 PM » |
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Maybe i am strange too and sarcastic In the nicest possible way, I'm sure... |
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Regards
David
3.91kWp PV (17 x Moser Baer 230 and Aurora PVI-3.6-OUTD-S-UK), slope 40°, WSW, Lat 57° 9' (Isle of Skye)
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brackwell
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« Reply #14 on: August 30, 2011, 03:36:25 PM » |
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Billi,
If everybody was as frugal as you i would give them my excess but seeing the way people dont even help themselves then why should I ? i MIGHT AS WELL BE NON FRUGAL
kEN
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